脑卒中三维监测微波成像设备原型

J. T. Tobon Vasquez, D. Rodriguez-Duarte, C. Origlia, G. Turvani, R. Scapaticci, M. Casu, L. Crocco, F. Vipiana
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引用次数: 1

摘要

本文综述了一种微波范围脑卒中监测扫描装置的研制和实验测试。该装置包括4个主要部分:传感器头盔、开关矩阵、数据采集部分和控制/处理核心。头盔中的传感器是22个定制的柔性天线,工作频率约为1GHz,与头部上部呈保角形。该系统的第一次验证包括在头部区域检测目标。实验测试是在一个单腔头部幻影上进行的,而目标是一个模拟中风的气球。气球和幻影的形状是从医学图像中提取出来的,组织特性是用类似它们介电特性的液体模拟出来的。差分测量方法感知两种不同情况下天线上的场,并通过对精确数值模型得到的离散散射算子进行奇异值分解,从它们的差异中计算出三维图像。实验结果验证了该系统检测和监测脑卒中演变的能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microwave Imaging Device Prototype for Brain Stroke 3D Monitoring
This paper summarizes the development and the experimental testing of a scanning device, in the microwave range, to monitor brain stroke. The device comprehends 4 main sections: a sensors helmet, a switching matrix, a data acquisition part, and a control/processing core. The sensors in the helmet are 22 custom-made flexible antennas working around 1GHz, placed conformally to the upper head part. A first validation of the system consists in the detection of a target in the head region. Experimental testing is performed on a single-cavity head phantom, while the target is a balloon mimicking the stroke. The shape of the balloon and phantom are extracted from medical images, and tissues properties are emulated with liquids that resemble their dielectric properties. A differential measurement approach senses the field on the antennas in two different situations, and from their difference computes a 3-D image through a singular value decomposition of the discretized scattering operator obtained from an accurate numerical model. The results verify the capabilities of the system on detecting and monitoring stroke evolution.
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